A simple and efficient one-potsynthesis of substituted indolo[1,2-a]quinolines under transition-metal-free conditions has been developed. When 2-fluorobenzaldehyde was treated with substituted 2-methylindoles in the presence of Cs2CO3, the desired products were typically obtained in good to excellent yields. This reaction sequence involves a nucleophilic aromatic substitution and a Knoevenagel condensation
已经开发了一种在无过渡金属条件下简单高效的一锅合成取代吲哚[1,2- a ]喹啉的方法。当在Cs 2 CO 3存在下用取代的2-甲基吲哚处理2-氟苯甲醛时,通常以良好或优异的产率获得所需产物。该反应序列涉及亲核芳族取代和Knoevenagel缩合反应。我们的机理研究表明,第一步中两个反应都可能以分子间反应的形式进行。
Efficient solid-phase synthesis of 2,3-substituted indoles
作者:Dean A Wacker、Padmaja Kasireddy
DOI:10.1016/s0040-4039(02)01025-0
日期:2002.7
The development of the solid-phase version of the modified Madelung indole synthesis is reported. The chemistry was initiated with the reductive amination of Bal resin using an ortho substituted aniline. The resin bound aniline was acylated with a variety of acid chlorides followed by cyclization with base to provide the desired indole after TFA-promoted cleavage from the resin. (C) 2002 Elsevier Science Ltd. All rights reserved.